Malicious PDF — malware analysis report

Static analysis result for SHA-256 154cd9c3589284cf…

MALICIOUS

PDF

74.3 KB Created: 2021-01-08 18:14:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-31
MD5: bb60268c6a7666e52dd70ee4fa80a71c SHA-1: 1a581e25d2ed3c65ae60cfe942156ce8e4ea61f4 SHA-256: 154cd9c3589284cfa34c99d6b90879f03aa848b0cc1935fb7fa802050e0d03e7
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffine.ru/wb?keyword=euro%20truck%20simulator%20american%20download%20free In PDF document text
    • https://cdn.sqhk.co/mapigusene/I6ogdjd/84628673914.pdfIn PDF document text
    • https://nadunetuvopalo.weebly.com/uploads/1/3/4/8/134884029/539c1b8f6a4f.pdfIn PDF document text
    • https://cdn.sqhk.co/jakufomego/cjbNhjE/rr_graphics_apk_download.pdfIn PDF document text
    • https://bunepefetupudir.weebly.com/uploads/1/3/2/7/132741430/334b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464877/normal_5fc8c6cb0b124.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495413/normal_5fd325af809ec.pdfIn PDF document text
    • https://cdn.sqhk.co/lilanoto/jzfkrhj/mystic_messenger_zen_bad_ending_1_walkthrough.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494451/normal_5fbb897434121.pdfIn PDF document text
    • https://cdn.sqhk.co/dakizenewa/idifhfO/stream_video_downloader_firefox_addon.pdfIn PDF document text
    • https://noxagutut.weebly.com/uploads/1/3/4/4/134483949/pefiwelaxuriwej.pdfIn PDF document text
    • https://vajugape.weebly.com/uploads/1/3/4/7/134767319/d20332.pdfIn PDF document text
    • https://cdn.sqhk.co/wirumedaba/djhpVjf/transport_it_idle_tycoon_apk_download.pdfIn PDF document text
    • https://bonomomu.weebly.com/uploads/1/3/0/7/130775928/85856.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ba76be7-4df2-4625-846c-52eb072ba2ed/sofubup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7af9e82-c23c-411c-8d6e-4ef6eb6cd074/41468480219.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE731 5280 bytes
SHA-256: cdc93dd956435eebde30f441fa7ef6d566ea3a3dcea68f287dbeb6bd601ce0cf
font_01_sfnt_off0000f926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF926 10420 bytes
SHA-256: 89dfd377e7d6a508f97020ecf0a3028d51f3611f0d9014081431c60ae2d6b572

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